Billy Eppler’s offseason strategy with the Mets bullpen centered on adding three proven arms to the roster and filling the other vacancies with quantity over track record.

That meant augmenting David Robertson, Adam Ottavino and Brooks Raley with relievers who had minor-league options remaining or were low-risk free agents who could be shuttled between Triple-A Syracuse and the Mets depending on need, bringing flexibility to the bullpen and ensuring there’s always a fresh arm nearby.

But that system is dependent on finding the right pieces, and to this point the returns haven’t been great for Eppler.

Jeff Brigham, acquired in a trade with the Marlins, has been a solid piece to the bullpen for much of the season, but relievers such as Stephen Nogosek, Jimmy Yacabonis, John Curtiss and Dennis Santana — utilized at various points — haven’t been as consistent.